Sole stitcher



Ap 1930- 2 JnBQBI'RRER 1,752,722

SOLE STITCHER Filed July 14, 1925 s Sheets-Sheet 1 JOHN EIRR Y I INVENTDR p 1930-' V J. B. BIRRER 1,752,722

SOLE STITCHER Filed July 14. 1926 3 'SheetsSheet 2 A Horne} J. B. BIRRERSOLE STITCHER April 1, 1930.

Filed July 14. 1926 '3 Sheefs-Sheet S danger of broken Patented Apr.- 1,1930 l 1 UNITED STATES,

PATENT OFFICE" mm B. IBIRRER, or ALiIAMBRgUALIFORNIA some STITCHERApplication filed July 14,

j5 struction; that is positive in feed action; that is provided with apositive locking means to insure against slipping ofv the work; and thatis economical to operate, especially because of elimination in greatmeasure of the parts like the awl and needle. I

The objects, among others, I attain by the provision, formation andassemblage of parts and members as hereinafter set forth, the

115 same being fully illustrated in the acc0mpanying drawings, in whichFigure 1 is an isometric drawing of my machine, with some parts cut awayto show the specific parts and members constituting the improvementshereinafter claimed.

Figure 2is a front elevation of my machine showing the relation ofvarious members involved in my improvements, and clearly illustratingtwo positions of the combined feeding and. locking members, .drawnapproximately to scale.

Figure 3 is a top view on the same scale as Figure 2, particularlyillustrating the, action of the feeding mechanism, the locking a0mechanism being cut away.

I Referring more particularly to the drawin s: I

fa indicates the base and uprights of a rigid frame supporting thecomplete mechanism.

B indicates a wax-heating tank through which the thread passes.

DD indicate rigid standards, the upper end thereof provided withbearings for shaft 9.

E-E indicate rigid standards provided with bearings for shaft F.

G indicates a lever arm hinged upon shaft F, for transmission of powerfrom a drum (19) keyed on shaft .9,to operate the thread and needlemechanism;

1 indicates aplate upon which the work rests, shown in the drawing as aseparate member rigidly attached to standard A.'

2 indicates a foot rigidly attached to lever .5-6 arm 2, said arm 2being rigidly attached 1926. Serial No. 122,324.

to angle-arm 2 the latter being loosely I hinged on shaft 3.

a 2" indicates a relatively long lever-arm adapted to operate through 2as a fulcrum to press foot 2 downward against plate 1 when the rear armof lever-arm 2 is forced upwardly bydisk cam 7. 2 indicates aperforation in arm 2 adapted to receive knob 7 of drum 7 to serve as astop. r

3 indicates a spool revoluble upon shaft 3, and is provided with a gearsector (3*) and an annulargroove, -3 a 3 indicates a shaft rigidlymounted in standards AA, upon which spool 3 revolves. Angular arms 2 and2 and spool 25 also revolve about shaft 3. j 3 indicates gear teethprovided on a flange (3 of spool 3, adapted to co-act with correspondinggear teeth (4 of rocker arm 4, in sliding and rotary motion.

type, removably attached to gear sector 3 and adapted to pass upwardlythrough corresponding slots in plate 1 and foot 2 synchronously with therotation of spool 3. a

4 indicates a rocker arm hinged on shaft F as a fulcrum, provided withapinand roller (4 adapted to slide within a cam groove in power-drum 6;arm 4 is also provided with-a gear sector at its forward end adapted tocoact with gear sector 3 V 5 indicates a lever pivoted on a rigid platesurface (13), by means of multiple perforatio'ns 5 and pin therein, andprovided with a split end, 5 5 to span spool 3, and provided withrollers mounted on said spanning terminals adapted to slide withinannular groove 3. The distal end of arm,5 is also provided with aroller, 5*, adapted'to slide within cam groove 6 of drum 6. g

5 indicates a guide for arm 5. I a.

6 indicates a power drum keyed on shaft .9 and provided with aperipheral cam groove, 6, and a sidecam groove, 6 j 7 indicates a diskcam rigidly attached to a spool, 10, which is revoluble about shaft 9,and is provided with a projection, 7 adapted to serve as a stop. Astrong helical spring, 7 its ends attached to disk 7 and standard E,isadaptsdto be always under tensionto 3 indicates a curved awl of theordinary hold disk 7 in operative position, i. e. to press upwardly uponlever arm 2.

8 indicates an arm pivotally hinged to slidin bar 11 by means of rod11", and is provi edwith a projecting pin, 8, adapted to engage theteeth of sector 10 in ratchet aotion. Arm 8 and pin 8 practicallyconstitute a pawl to co-act with toothed sector 10 to revolve spool 10and is hereinafter so styled. Arm 8 is further provided with an inclinedforward end, 8, adapted to raise pawl 8 as it moves forwardly onstandard 15 at 15, thus releasing pin 8 from ratchet 10,

whereupon spring 7 b immediately. pulls disk 7 into locking action.

- 9. indicates a main power shaft bearing in standards DD, and uponwhich drums 6 and 19. are keyed.

10 indicates a toothed ratchet sector rigidlyfixed to spool 10, adaptedto actuate disk 7 in cam action.

11 indicates a slidebar moving longitudi nally on lever arm 4 withinguides 11*, and is provided with a laterally projecting pin, adapted tobear a roller, 11*, to move within groove 6"; and is further providedwith a rigid upright rod, 11, upon which pawl 8 is pivote a 13 indicatesa horizontal plate attached to or a part of frame A, upon which arm 5 ispivotally hinged and slides in lateral motion.

25 indicates a spool revoluble about shaft -23, and'is provided with agear sector, 26,

(not shown), and a curved needle, 20, of the ordinary type. a

GG indicates the proximal end of arm Gr, provided with gear teethadapted to engage corresponding teeth on gear sector 26.

19, 21, 22, 23 and 24 indicate a power drum cam, a thread measurer,thread lifter, shuttle housing and shuttle, respectively.

The operation of the locking and feeding mechanism during a completerevolution of drum 6 is as follows:

By manipulation of the fingers disk cam 7 is drawnforward against springtension of spring 7 to allow arm 2 to fall slightly by gravity, thusopening a gap between foot 2 and plate 1, and the work is insertedtherein; on release of disk 7 the pressure under arm 2 is restored andthe work securely locked; drum6 is then rotated clockwise, forcing downarm 4: by cam action, thus revolving sector 3 to force awl 3 upwardlythrough slots in plate '1 and foot 2 to pierce the work; sliding bar 11and pawl 8 move forward by cam action; pin 8* engages the teeth ofsector 10* in ratchet action; this last causes disk 7 to revolve andmomentarily partially release the pressure under arm 2; while awl 3 isstill in the work, foot 2 is thus released momentarily andsimultaneously therewith arm 5 is moved laterally by cam action toforcethe awl 3 and the work tothe left a distance adjustable by theposition of pin in perforations 5; simultaneously with the completion ofthis leftward movement of the awl and work, pawl 8 has moved forward,risen on standard and released disk 7 so that the same springs back intopositive locking action to hold the work securely for succeeding steps;power arm 4 then rises by cam action, thus withdrawing awl 3"; as awl 3is moving downward, arm G is forced upward by cam action to revolvespool 25, forcing needle downward through the perforation last made byawl 3 in the work.

The immediately succeeding steps of catching and measuring the thread byarm 21, lifting the thread by arm 22 to engage the nose of shuttle 24:,traveling oflshuttle 24: in housing 23, and withdrawal of needle 320 byreverse action of power arm G, are well known in the art, and no claimof novelty therewith is intended.

After withdrawal of awl 3",ai'1n 5 moves laterally in reversed action tomove spool 3 to the right, thus placing awl 3 in its original positionfor repetition of the operation above .set forth.

Having thus disclosed my invention and explained its operation, I claimas new and desire to obtain Letters Patent of the United States upon:

1. In a sole stitcher of the character disclosed, a lever of the firstorder pivoted forwardlyof its center to afford verticalmotion of'thesame; the forward-and shorter arm thereof terminating in a slotted footadapted to co -act with a corresponding slotted fixed plate in lockingaction; a cam mounted to rotate under the rear end and in contact withthe rearward terminal of said lever; spring means to rotate said cam toraise said longer arm of said lever and maintain the same in raisedposition; and means to release said longer arm terminal comprising aco-acting ratchet and pawl.

2. In a sole stitcher of the character disclosed, a lever pivotedforward of its center to afford vertical motion of its arms; the forwardend thereof terminating in a slotted foot adapted to co-act'with acorresponding fixed slotted plate in looking action on the work; a cammounted to rotate beneath and contact with the long arm terminal of saidlever; spring means for operating said cam to raise said long arm ofsaid lever and maintain the same in raised position; a ratchet wheelfixedtosaiclcani;apawl adapted to coact with said ratchet wheel torotate said cam against said spring; cam means for actuating said pawlto rotate said first camat predetermined times, all as substantially setforth.

In witness whereof I have set myhand to this application and power ofattorney this day of June, 1926. p

' JOHN B. BIRRER.

